Science Savvyhttps://sciencesavvy.onlinerockershub.com
Learn Science OnlineTue, 24 Oct 2017 13:08:37 +0000en-UShourly1https://wordpress.org/?v=4.8.4https://i0.wp.com/sciencesavvy.onlinerockershub.com/wp-content/uploads/2017/09/cropped-Science-Savvy-logo.png?fit=32%2C32&ssl=1Science Savvyhttps://sciencesavvy.onlinerockershub.com
3232135911609Kinematic link and its exampleshttps://sciencesavvy.onlinerockershub.com/kinematic-link-examples/
https://sciencesavvy.onlinerockershub.com/kinematic-link-examples/#respondSun, 24 Sep 2017 14:08:13 +0000https://sciencesavvy.onlinerockershub.com/?p=6201What is a machine? A machine is a device that transmits force or directs its applications. In Kinematics, a machine can be further simplified into Links, joints, pairs, etc What is a Kinematic link? A kinematic link is just a part of a machine, which moves relative to another part of a machine. Kinematic link […]

]]>https://sciencesavvy.onlinerockershub.com/kinematic-link-examples/feed/06201What is gravity, is all about?https://sciencesavvy.onlinerockershub.com/gravity/
https://sciencesavvy.onlinerockershub.com/gravity/#respondMon, 04 Sep 2017 03:30:21 +0000https://www.onlinerockershub.com/?p=6174Have you heard about Gravity? What silly question is that? The movie released in 2013. It has won 7 Oscar awards. Who wouldn’t know about that? If you think the same, just bookmark this page and read this later. Because, I am talking about the Gravity, which makes you sleep comfortable on your bed, rather […]

What silly question is that? The movie released in 2013. It has won 7 Oscar awards. Who wouldn’t know about that?

If you think the same, just bookmark this page and read this later.

Because, I am talking about the Gravity, which makes you sleep comfortable on your bed, rather than keeping you float in the air.

Jokes apart!

What is gravity?

To explain in simple,

It is an attractive force between two masses.

Right now, you are reading this post on your gadget ( be it a smartphone/ laptop / PC). If there is no gravity, probably your gadget will be floating on air, and you will be chasing your gadget in the air.

Now, you come to know what is gravity. It’s the one that attracts you to the Earth.

Then, what is the gravitational force?

Be it gravity or gravitational force or gravitation. They all mean the same.

So, who discovered gravity?

Gravitation was discovered by Sir Isaac Newton. When an apple fell on Newton’s head, he thought something different, than others. Why did the apple fell down? It could have fly upwards, right?

After years of research, Newton understood that it was Earth, which attracted the apple down. This attraction is what called as gravitational force.

If you are interested in Newton’s discovery of Gravitation, watch this video below.

Do, we come across gravity in our everyday life?

In our everyday life, we come across gravity. Like,

When a cricketer hits the ball high, it comes down for a catch. If there was no gravity, the ball would have flown away.

You write on paper often. If there was no gravity, the ink from your pen would be floating in the air and does not stick to the paper.

These are just a few examples of gravity in our everyday life. There are lots more.

So, gravity is a part of our everyday life.

But, how do we calculate these gravitational forces?

To calculate gravitational force, we can make use of this formula,

Where,

– is the Gravitational force,

– is the Gravitational constant

– are the masses of the two objects

– is the distance the two objects

Making use of this formula, you can calculate the gravitational force between two objects.

But still, what causes gravity?

Every body has its own gravitational field. The Earth has its own, we human beings have our own. Even a cricket ball has its own.

Why don’t we feel the gravitational force?

The reason is that gravitational force depends upon two important things:

Mass of the two objects

Distance between the two objects

From the formula, I showed you above, gravitational force directly depends upon the masses. So, the greater the masses, greater is the gravitational force.

Also, we noticed gravitational force varies inversely as the square of the distance between the two objects. So, as we keep on increasing the distance between the two objects, the lesser, the gravitational force between them.

For better understanding, here is a video from LMES. The audio is Tamil. No subtitles are available as of now.

What do you think about gravity?

So, in this post, you learned about gravity. To summarize what is the gravitational force, it is simply an attractive force between two objects, that depends upon the masses of the two objects and the distance between them.

I have mentioned few examples of gravitation, in this post. If you have more examples, post them in the comments section.

]]>https://sciencesavvy.onlinerockershub.com/gravity/feed/06174Fact’ory from Lets Make Engineering Simple (1 -50)https://sciencesavvy.onlinerockershub.com/lmes-facts-1-50/
https://sciencesavvy.onlinerockershub.com/lmes-facts-1-50/#respondSat, 06 May 2017 02:21:32 +0000https://www.onlinerockershub.com/?p=4640Lets Make Engineering Simple (LMES) is an educational organization. We already have few interesting posts at OnlineRockersHub, with videos from LMES. If you have missed that, you can check out LMES posts here. Now, LMES has started publishing some interesting facts on social media in the name of Factory. I am sharing facts from […]

]]>Lets Make Engineering Simple (LMES) is an educational organization. We already have few interesting posts at OnlineRockersHub, with videos from LMES. If you have missed that, you can check out LMES posts here.

Now, LMES has started publishing some interesting facts on social media in the name of Factory. I am sharing facts from #1 – #50 in this post.

]]>https://sciencesavvy.onlinerockershub.com/lmes-facts-1-50/feed/04640Bearings – do you know, what are they?https://sciencesavvy.onlinerockershub.com/bearings/
https://sciencesavvy.onlinerockershub.com/bearings/#commentsFri, 14 Apr 2017 05:30:26 +0000https://www.onlinerockershub.com?p=4836&preview=true&preview_id=4836Today we will have a look on an interesting mechanical component. It’s nothing, but bearings. Do you know what is a bearing? Well, you might be familiar with that. If not, let’s check it out what’s that. What are Bearings? Here is a technical definition of bearings. Bearings are highly engineered, precision made components that […]

]]>https://sciencesavvy.onlinerockershub.com/bearings/feed/14836What are summer tyres and winter tyres and when are they used?https://sciencesavvy.onlinerockershub.com/summer-tyres-winter-tyres/
https://sciencesavvy.onlinerockershub.com/summer-tyres-winter-tyres/#respondWed, 04 Jan 2017 02:30:23 +0000https://www.onlinerockershub.com/?p=3759Do you know you have different car tyres for different seasons? Should you change your car tyres for every season? Let me explain you about this in detail in this post. Note: Throughout this post, I will be using the word ‘tyre’. The word ‘tyre‘ and ‘tire‘ means the same. They vary as per British […]

Winter tyres:

Winter tyres are usually made up of a soft rubber compound. They are employed in cooler conditions where the temperature is generally less than 7° C. They are also suitable for rainy conditions and snow conditions.

The winter tyres are usually fitted with steel rims and not expensive alloy metals. Because the expensive allow metals can corrode when comes in contact with moisture (snow).

Winter tyres are so soft when you compare with Summer tyres, because of the presence of Silica in the winter tyres.

Glass transition temperature:

What is glass transition temperature and how it impacts summer tyres and winter tyres?

Glass transition temperature is nothing but the temperature at which the polymer changes from glassy state to rubbery state.

Below the glass transition temperature the polymer is going to be hard, brittle and plastic and above the glass transition temperature, the polymer is going to be soft, flexible and elastic.

The winter tyres are made up of materials with low glass transition temperature. So that they easily attain the rubbery state ( soft).

The summer tyres are made up of materials with higher glass transition temperature. So that they remain in the glassy state ( hard)

Which tyre should you prefer in cold conditions?

In colder conditions where the temperature is less than 7° C, winter tyres are preferred. Winter tyres have a deeper thread when compared to summer tyres. The deeper tread allows the snow to pass through. Thus these tyres remain so flexible even at low temperature.

You can also go with All season tyres.

Summer tyres are not preferred during cold conditions because these tyres are so hard. It does not provide the required traction in the snow to stop the car. Also, the summer tyres have smaller tread when compared to winter tyres. Thus, when you hit the brake in the snow with summer tyres, you are going to travel extra distance which is dangerous.

Which tyre should you prefer in summer seasons?

Winter tyres are not preferable for summer seasons because they wear out easily when it gets hot. They also have higher rolling resistance. Thus they are going to consume more fuel. So, it is not a good idea to use winter tyres during the summer season. Also, driving with winter tyres in summer season disturbs your driving comfort.

If you have fitted all season tyres in your car, no worries.

Summer tyres are the best for the summer season. Because the summer tyres become sticky at high temperature. They are so hard and they offer a better traction with the road.

Here is a video from Auto Express, which explains about usage of winter tyres and summer tyres.

Conclusion:

I hope you like this post and found this post useful. I am eagerly looking forward to your comments. If you find any discrepancy in this content, comment below.

]]>https://sciencesavvy.onlinerockershub.com/summer-tyres-winter-tyres/feed/03759Do you know? You can never really touch an objecthttps://sciencesavvy.onlinerockershub.com/never-really-touch-object/
https://sciencesavvy.onlinerockershub.com/never-really-touch-object/#respondTue, 13 Dec 2016 02:30:00 +0000https://www.onlinerockershub.com/?p=3364Today’s let’s discuss an interesting topic. To be clear, this is the very basic of Science. It’s about the atoms. Let me explain you in detail about these atoms. Origin of the term atom: The term ‘Atom‘ is generally derived from the Greek word ‘Atomos‘.Generally, atoms are very hard. In Greek, the prefix ‘a’ means ‘not’ […]

]]>Today’s let’s discuss an interesting topic. To be clear, this is the very basic of Science. It’s about the atoms. Let me explain you in detail about these atoms.

Origin of the term atom:

The term ‘Atom‘ is generally derived from the Greek word ‘Atomos‘.Generally, atoms are very hard. In Greek, the prefix ‘a’ means ‘not’ and ‘tomos’ means ‘cut’. Thus meaning uncuttable. Thus the term ‘atomos’ means indivisible and the term ‘atom’ was derived from ‘atomos’.

What is an atom?

Atom is the smallest particle. To explain the size of an atom, imagine a cricket ball.

What is atom made up of ?

The protons are generally positive charge. They are shown with red color balls in the above image. The neutrons are chargeless. Hence, they are shown with white color balls. The electrons are negative in charge. They are shown by blue color balls.

The protons and neutrons together form a nucleus. The electrons revolve around the nucleus.

How do these constituents attract and repel?

Generally,

Like charges repel and Unlike charges attract each other.

For example, Two positive charges will repel each other. Two negative charges will repel each other. But, a positive charge and a negative charge will attract each other.

Now, let’s get back to the question.

Can you really touch an object?

Technically speaking, you can never touch an object.

You may now be thinking that I am making fun of you. But, I will explain you actually what happens. You can get to know after you try out these simple experiments.

Experiment to try out:

Take a plastic glass filled with water. Make a small hole in the glass in such a way, that water flows out of the plastic glass continuously. Now, take a balloon filled with air. Now, rub this balloon with your body hair. Now, bring this balloon closer to the water draining out the plastic glass. And see what happens next …

Another experiment to try out:

Take 2 balloons filled with air. Rub these two balloons with your body hair. Now, bring these two balloons closer and see what happens.

If you are interested in watching these experiments, check this video from LMES.

Why did those objects repel ?

In both the above experiments, you would have noticed repulsion.

Since you brought closer two objects of the same charge, a repulsive force acts between these two objects.

Similarly,

Whatever the object you touch, your body experiences a repulsive force. But, this repulsive force is minute and you don’t experience it.

Since, two electrons ( which revolve around the nucleus in orbits) cannot come closer, you cannot touch an object.

I guess, you would have liked this discussion. Don’t forget to share this post with your friends on social media. You can subscribe to our education newsletter for more posts.

]]>https://sciencesavvy.onlinerockershub.com/never-really-touch-object/feed/03364Origin of the calculus and its interesting applicationshttps://sciencesavvy.onlinerockershub.com/calculus-origin-applications/
https://sciencesavvy.onlinerockershub.com/calculus-origin-applications/#commentsThu, 16 Jun 2016 09:40:29 +0000https://www.onlinerockershub.com/?p=627It’s no doubt that the name Calculus will tend to stir the fear for many people. Have you ever went on to search why this Calculus was discovered and who were the Geniuses behind its origin? Did you see it? I said who were the ” Geniuses ” behind it. Yes, it was not a […]

Origin of Calculus:

There are a lot of facts that certain rules used in Calculus were discovered in ancient days. But, however, these two Gentlemen were the main contributors. But, don’t worry, I will not bore you with a detailed history, I will give you a gist of this tale. You can have a detailed one of the Wikipedia page with each one’s contribution.

Newton’s contribution:

It was Newton who first got deep into this. Newton was very famous for his Gravity. He had the need to prove his laws. He studied about the speed and the rate of change. He created new variables and named them fluxions ( represented by a dot at the top of the letter). He termed them as Method of Fluxions.

Leibniz ‘s contribution:

8 years later, Leibniz, a german polymath, and Philosopher went deep into Calculus. He was the one who introduced the ” = ” equal symbol. He studied about the tangents and its formation. However, Leibniz was the first to publish a paper on Calculus. There are sources saying that Leibniz has read the manuscripts of Newton and used it to develop this concept. Leibniz brought out analytical calculus.

Controversy:

Image Source: Wikimedia

After years of controversial arguments, both men are given credits for their contribution to Calculus. However, Newton was given credits for his Method of Fluxions and Leibniz was given credits for its Analytical Calculus. Newton represents the derivative of a function with function, whereas Leibniz represented the derivative of a function by dy/dx . Also, Leibniz was the one who introduced the integral symbol, represented by. We currently use Leibniz method of representation.

Study of Calculus:

The study of Calculus is really interesting and some of its common terms are Differentiation, Integration, Maximum value, Minimum value, etc. The following videos are from Lets Make Engineering Simple ( LMES). In these videos, Prem Anand Sethurajan will give you a clear idea about how to use Calculus.

Note: The following videos are available only in Tamil.

Applications of Calculus:

Students are made to learn Differentiation and Integration with no idea on how they are going to use it. Here is two more video, which will explain you about applications.

]]>https://sciencesavvy.onlinerockershub.com/calculus-origin-applications/feed/4627How can you locate yourself in android apps? How is related to GPS?https://sciencesavvy.onlinerockershub.com/gps-satellite/
https://sciencesavvy.onlinerockershub.com/gps-satellite/#respondSat, 21 May 2016 07:00:00 +0000https://onlinerockershub.com/2016/05/21/gps-satellite/Have your ever wondered how your being located in your smartphones? How did Google trace out your location? Well, that’s our topic today. What is GPS and GPS receiver? GPS stands for Global Positioning System. A GPS receiver is nothing but an electronic device that receives GPS signals from satellites , that revolve around the earth in […]

]]>https://sciencesavvy.onlinerockershub.com/gps-satellite/feed/014How to time travel to the past ?https://sciencesavvy.onlinerockershub.com/time-travel/
https://sciencesavvy.onlinerockershub.com/time-travel/#respondSat, 30 Apr 2016 07:00:00 +0000https://onlinerockershub.com/2016/04/30/time-trave/Have you ever thought about time traveling ? Going back to the past, you will get your childhood days back. So awesome to imagine about? Is it possible to time travel to the past? The answer to the question is yes. Time traveling is possible. Now you will have the curiosity to know, how to […]

]]>https://sciencesavvy.onlinerockershub.com/time-travel/feed/016How aircraft stays in the atmosphere without falling down?https://sciencesavvy.onlinerockershub.com/aircraft-bernoulli-theorem/
https://sciencesavvy.onlinerockershub.com/aircraft-bernoulli-theorem/#respondTue, 26 Apr 2016 08:15:00 +0000https://onlinerockershub.com/2016/04/26/bernoulli-theore/Have you ever wondered how aircraft flies in the atmosphere without falling down? If you were one among the admirers, you are at the right place to know about it. Reason for aircraft staying in atmosphere: The reason behind air crafts staying in the atmosphere is nothing but Bernoulli’s theorem. Have you heard […]